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KICKBACK, a tale of alignment and open gaps.......

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Blog entry by KTMM (Krunkthemadman) aka. Lucas Crenshaw posted 11-08-2010 07:40 AM 1056 reads 0 times favorited 4 comments Add to Favorites Watch

I’m ok. The KICKBACK was rather controlled and expected to say the least. It was caused by the fact that the opening on the stock insert is rather large and I was cutting a slim piece off of my INCRA Miter 5000. Let me tell you that the very next two things on my saw list are the installation of a zero-clearance insert and a front mounted power switch. The picture bellow show’s the piece that decided to KICKBACK… It could have been bad.

OK, there are pictures added to the gallery. Which can be seen here.

I don’t have a single Incra product that I’m not happy with, they are some of the few tools that are currently on the market that have exceeded my expectations. Read the instructions and they are easy to use, which is a rare thing these days.

Setting up the Incra 5000 involves cutting it’s edges to custom fit it to the saw being used. Mine was cut to fit the Ridgid R4511 that I had. Luckily for me, the Craftsman’s miter slots are closer to the blade on either side by about 3/8 of an inch. I was doing fine cutting the offcut side to fit, but it was when I cut the miter sled side that I had a problem. The offcut stopped parallel to the saw blade and debated on falling into the open gap. At that moment, I knew I could be in serious trouble if I didn’t get the saw powered off. The problem is that the power switch is on the back of this saw, on the motor. Stupid me, I didn’t plug the cord in where I could unplug it. SO, I quickly removed the miter sled and placed it on the floor. I moved to the rear of the saw and powered it down, and braced for impact. Sure enough, the piece snagged as the RPMS dropped at the blade. The piece ricocheted off the wall in front of the saw and landed harmlessly on the floor. I’ve noticed on every saw I’ve ever worked on that there is an RPM range in which the harmonics cause the blade to vibrate ever so slightly. I could have probably pulled the offcut away from the blade, but I didn’t see a safe way to do it from where I was at. Just an FYI, but I did have my safety glasses on, as always. Also, I always make sure there’s a clear path to the power source of my tools. If you can’t find the power switch, yanking the cord works well.

Also, I’ve added a couple of photos of the way I clamped my square to the Incra in order to get it aligned. This is the best way I’ve found to do it. It’s not in the manual, so take notes.

-- Practice does not make perfect. Only perfect practice makes perfect. Vince Lombardi



4 comments so far

View NBeener's profile

NBeener

4806 posts in 1833 days


#1 posted 11-08-2010 08:56 AM

Glad you’re okay.

Another happy Incra customer, here. Good stuff at fair prices.

-- -- Neil

View Roz's profile

Roz

1659 posts in 2445 days


#2 posted 11-08-2010 04:05 PM

Sounds like an exciting couple of minutes! I never thought much of kick backs until I learned of a neighbor who died as a result of one. Get all those safety features you can and make it a priority. Your upgrade looks great.

-- Terry Roswell, L.A. (Lower Alabama) "Life is what happens to you when you are making other plans."

View William's profile

William

9047 posts in 1501 days


#3 posted 11-08-2010 04:09 PM

It seems to me your next step should be moving the switch to a reachable location. I had not realized the only switch was ON the motor or I would have been bugging you about that one a couple of weeks ago. I know you have a custome switch that you planning on mounting in the future sawstation cabinet (I think). How about running the cord through a utility box with a light switch cutoff in it, mounted towards the front of the saw for now?
I’m glad you’re alright.

-- http://wddsrfinewoodworks.blogspot.com/

View ajosephg's profile

ajosephg

1854 posts in 2220 days


#4 posted 11-08-2010 04:10 PM

I think a switch with the BIG stop button is the way to go, because in an emergency it may be tough to yank a power cord in a timely manner. Plus, pulling a cord requires you to bend over to pick it up possibly putting your head in harms way. Rockler and others sell them.

Of course, as you now know, the best solution is to never a have a kick back in the first place.

PS – love the paint job on your saw. No Craftsman ever looked so good.

-- Joe

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